Yeah those numbers seem about right, NSW is currently up about 29%, PS4 down 18% and XB1 down 31%, if those numbers stay the same than we would have
December is hard to tell if they will stick to current trends, for PS4/XB1 it depends on what kind of deals they offer and for NSW it depends on if general momentum can offset the lack of a big title like Smash Bros but those numbers above should be pretty close.
I don't think Switch can maintain the same year over year growth in December because Nintendo closed out 2018 strong. Still expect 2019 to show growth, but not on the level of 29%.
Sony's forecast for PS4 shipments suggests that they won't have many deals, if any at all. Their likely strategy is to tank the rest of the fiscal year to get better draft picks for the PS5.